An example method includes stimulating a wellbore using a plasma tool configured to operate in the wellbore. The method includes introducing the plasma tool into the wellbore and generating one or more first laser beams. The method includes directing the one or more first laser beams to one or more first points outside of the downhole unit and inside a volume of fluid at least partially confined by an acoustic mirror. The one or more first laser beams may create a plasma bubble at a first point resulting in one or more shock waves in the volume of fluid. The method includes deforming the acoustic mirror to produce, from the one or more shock waves, one or more destructive reflected waves directed to one or more second points outside of the downhole unit.